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Charge iPods through body movements or simply in the wind

Sorry, the technology isn’t there right now, but it’s conceivable – by using nanowires. All we’ll have to do is to move around or simply expose them to a light force, like a breeze or even water. Nanowires are extremely flexible and given their width is 1/5,000th of the diameter of a human hair, it doesn’t take much to bend them. These particular nano generators would contain zinc oxide which, when bent or stretched, produces small amounts of energy. So no more batteries in future, yippee! BUT: it’ll take a while to develop a generator with an adequate output of voltage and power.